It's a very good question as I bought a bike from walmart and never ride it cause its uncomfortable. I would just go directly to the store manager and let him or her know you are serious about buying a bike in their store but you would like to try it out. Maybe suggest that one of their...
It's usually vaseline after the make is appliedd. This will help you keep the make up the way you want it. The trick is to warm the vaseline (in the jar or container)in boiling. Check temp the apply gently and lightly where ever needed.